CN112979290A - 一种原位生成赛隆高强度耐侵蚀浇注料及制备方法 - Google Patents
一种原位生成赛隆高强度耐侵蚀浇注料及制备方法 Download PDFInfo
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Abstract
本发明涉及耐火材料技术领域,具体涉及一种原位生成赛隆高强度耐侵蚀浇注料及其制备方法。所述浇注料包含如下质量份的组分:棕刚玉55‑65%,碳化硅15‑18%,结合剂8‑12%,添加剂0.4‑0.6%,基质12‑15%。本发明所研制的浇注料,利用原位生成赛隆相,在高温使用过程中具有良好的抗渣性能和力学强度,使铁沟使用寿命得以延长,对钢铁行业的环保、增效等方面有重要意义。
Description
技术领域
本发明涉及耐火材料技术领域,尤其涉及一种原位生成赛隆高强度耐侵蚀浇注料及其制备方法。
背景技术
浇注料又称耐火浇注料,是一种由耐火物料加入一定量结合剂制成的粒状和粉状材料,具有较高流动性,以浇注方式成型的不定形耐火材料。
高炉出铁沟是高炉出铁过程中引导高温铁水和熔渣流动的通道,因而,高炉出铁沟内衬在实际生产过程中与高温铁水、熔渣直接接触,承受流动铁水和熔渣的冲刷、磨损、化学侵蚀以及频繁交替出铁引起的急冷急热,导致铁水和熔渣对耐火材料表层的冲刷磨损、侵蚀熔损、应力裂纹、渗透和结构破损。因此,对高炉出铁沟用耐火材料的高温力学强度和耐化学侵蚀性提出了严格的技术要求。
随着冶金技术的不断发展,国内炼铁产业的升级,高炉向着容积大,炉压大,出铁温度高的方向发展,使出铁流速,出铁温度,出铁时间,同渣量不断提高,加速了渣铁对出铁沟的侵蚀,不断的提升对出铁沟耐火材料的要求。出铁沟耐火材料在高温状态下的强度及抗渣性能的提升就显得尤为重要。
因此,如何提供一种高强度耐侵蚀的耐火浇注料是本领域技术人员亟待解决的技术问题。
发明内容
本发明的目的在于提供一种原位生成赛隆高强度耐侵蚀浇注料,该浇注料在高温使用过程中具有良好的抗渣性能和力学强度,使铁沟使用寿命得以延长。
为了实现上述发明目的,本发明提供以下技术方案:
本发明提供了一种原位生成赛隆高强度耐侵蚀浇注料,包括如下重量份的原料:
棕刚玉55-65份,碳化硅15-18份,结合剂8-12份,添加剂0.4-0.6份,基质12-15份。
优选的,所述棕刚玉粒径为0-15mm,Al2O3含量不低于95wt%,气孔率<2.3%,体积密度>3.7g/cm3。
优选的,所述棕刚玉的粒径组成为0.5-1mm,1-3mm,3-5mm,5-8mm,8-15mm,上述不同粒径棕刚玉质量比为1-3:2-4:1-3:3-5:1-2。
优选的,所述碳化硅的粒径组成为:粒径≤0.25mm的碳化硅占30-40%,粒径0.25-1mm的碳化硅占60-70%。
优选的,所述结合剂为硅微粉、水泥、球状沥青、金属硅粉,各原料添加比为4-6:4-6:4-6:5-7;所述硅微粉的粒径为5-10μm,水泥粒径为3-5μm,球状沥青的粒径为0.2-1mm,金属硅粉粒径为190-210目。
优选的,所述添加剂为有机纤维、金属铝粉、六偏磷酸钠、减水剂BC-2,各原料添加比为7-9:13-16:4-6:14-17。
优选的,所述添加剂中有机纤维为聚丙烯纤维,长度为2.5-3.5mm,直径为20-40μm,熔点为173-178℃。
优选的,所述金属铝粉粒径为80-200目。
优选的,所述基质为氮化硅与α-活性氧化铝微粉;所述氮化硅粒径为4-6um,α-活性氧化铝微粉粒径为2-4um;氮化硅与α-活性氧化铝微粉重量比为1-3:1。
本发明的另一目的在于提供一种原位生成赛隆高强度耐侵蚀浇注料的制备方法。
为实现上述发明目的,本发明提供了一种原位生成赛隆高强度耐侵蚀浇注料的制备方法,包括以下步骤:
(1)按比例称取棕刚玉和碳化硅,混合搅拌3-4min;
(2)再将结合剂、添加剂、基质按比例加入到步骤(1)的混合物中,搅拌4-6min,搅拌均匀即可。
经由上述的技术方案可知,与现有技术相比,本发明有益效果如下:
本发明制备的一种原位生成赛隆高强度耐侵蚀浇注料,利用氮化硅与氧化铝在铁沟工作温度下反应,生成塞隆相,不用事先烧结制样;该浇注料在高温使用过程中具有良好的抗渣性能和力学强度,可延长铁沟的使用寿命,对钢铁行业的环保、增效等方面有重要意义。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
对比例1
(1)原料称取
取不同粒度的棕刚玉共61份,棕刚玉的粒径组成为0.7mm,2mm,4mm,7mm,12mm,上述不同粒径的棕刚玉质量比为2:3:2:4:1;
取碳化硅16.5份,其中粒径≤0.25mm的碳化硅占35%,粒径0.25-1mm的碳化硅占65%。
取结合剂共10.5份,结合剂由粒径为7μm的硅微粉、粒径为4μm的水泥、粒径为1mm的球状沥青、粒径为200目的金属硅粉按照6:6:6:7比例混合得到;
取添加剂共0.43份,添加剂由长度为3mm、直径为30μm、熔点为174℃的聚丙烯纤维、粒径为100目金属铝粉、六偏磷酸钠、减水剂BC-2按照8:10:5:5:15比例混合得到;
取α-氧化铝微粉6份,其中α-氧化铝微粉粒径为3μm;
(2)浇注料成品制备
将上述棕刚玉和碳化硅,混合搅拌3min,再加入结合剂、添加剂和α-氧化铝微粉充分混合搅拌5min,制备得到浇注料。
实施例1
(1)原料称取
取不同粒度的棕刚玉共55份,棕刚玉的粒径组成为0.5mm,1mm,3mm,5mm,8mm,上述不同粒径棕刚玉质量比为1:2:1:3:1;
取碳化硅15份,其中粒径≤0.25mm的碳化硅占30%,粒径0.25-1mm的碳化硅占70%;
取结合剂共8份,结合剂由粒径为5μm的硅微粉、粒径为3μm的水泥、粒径为1mm的球状沥青、粒径为190目的金属硅粉按照4:4:4:5比例混合得到;
取添加剂共0.4份,添加剂由长度为2.5mm、直径为20μm、熔点为173℃的聚丙烯纤维、粒径为80目的金属铝粉、六偏磷酸钠、减水剂BC-2按照7:13:4:14比例混合得到;
取基质共12份,基质由粒径为4um的氮化硅与粒径为2um的α氧化铝微粉按照质量比1:1混合得到;
(2)浇注料成品制备
将上述棕刚玉和碳化硅,混合搅拌3min,再加入结合剂、添加剂和α-氧化铝微粉充分混合搅拌4min,制备得到浇注料。
实施例2
(1)原料称取
取不同粒度的棕刚玉共60份,棕刚玉的粒径组成为0.7mm,2mm,4mm,6mm,12mm,上述不同粒径棕刚玉质量比为2:3:2:4:1.5;
取碳化硅16份,其中粒径≤0.25mm的碳化硅占35%,粒径0.25-1mm的碳化硅占65%;
取结合剂共10份,结合剂由粒径为8μm的硅微粉、粒径为4μm的水泥、粒径为1.1mm的球状沥青、粒径为200目的金属硅粉按照4:4:4:5比例混合得到;
取添加剂共0.5份,添加剂由长度为3mm、直径为30μm、熔点为175℃的聚丙烯纤维、粒径为140目的金属铝粉、六偏磷酸钠、减水剂BC-2按照8:15:5:16比例混合得到;
取基质共13份,基质由粒径为5um的氮化硅与粒径为3um的α氧化铝微粉按照质量比2:1混合得到;
(2)浇注料成品制备
将上述棕刚玉和碳化硅,混合搅拌4min,再加入结合剂、添加剂和α-氧化铝微粉充分混合搅拌5min,制备得到浇注料。
实施例3
(1)原料称取
取不同粒度的棕刚玉共65份,棕刚玉的粒径组成为1mm,3mm,5mm,8mm,15mm,上述不同粒径棕刚玉质量比为3:4:3:5:2;
取碳化硅18份,其中粒径≤0.25mm的碳化硅占40%,粒径0.25-1mm的碳化硅占70%;
取结合剂共12份,结合剂由粒径为10μm的硅微粉、粒径为5μm的水泥、粒径为1.2mm的球状沥青、粒径为210目的金属硅粉按照4:4:4:5比例混合得到;
取添加剂共0.6份,添加剂由长度为3.5mm、直径为40μm、熔点为178℃的聚丙烯纤维、粒径为200目的金属铝粉、六偏磷酸钠、减水剂BC-2按照9:16:6:17比例混合得到;
取基质共15份,基质由粒径为6um的氮化硅与粒径为4um的α氧化铝微粉按照质量比3:1混合得到;
(2)浇注料成品制备
将上述棕刚玉和碳化硅,混合搅拌4min,再加入结合剂、添加剂和α-氧化铝微粉充分混合搅拌6min,制备得到浇注料。
将对比例1和实施例1-3浇注料按YBT4126-2005标准进行检测,检测结果见表1。
表1
对比例1和实施例1-3的主要区别在于其基质中不含有氮化硅,由表1的检测结果可知,对比例1制备得到的样品的抗折强度和耐侵蚀性能均明显低于实施例1-3制备得到的样品。
由以上实施例可知,本发明提供了一种原位生成赛隆高强度耐侵蚀浇注料及制备方法,利用原位生成赛隆相,在高温使用过程中具有良好的抗渣性能和力学强度,使铁沟使用寿命得以延长,对钢铁行业的环保、增效等方面有重要意义。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (10)
1.一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,包括如下重量份的原料:
棕刚玉55-65份,碳化硅15-18份,结合剂8-12份,添加剂0.4-0.6份,基质12-15份。
2.根据权利要求1所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述棕刚玉粒径为0.5-15mm,Al2O3含量不低于95wt%,气孔率<2.3%,体积密度>3.7g/cm3。
3.根据权利要求1所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述棕刚玉的粒径组成为0.5-1mm,1-3mm,3-5mm,5-8mm,8-15mm,上述不同粒径棕刚玉质量比为1-3:2-4:1-3:3-5:1-2。
4.根据权利要求1所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述碳化硅的组成为粒径≤0.25mm的碳化硅占30-40%,粒径0.25-1mm的碳化硅占60-70%。
5.根据权利要求1所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述结合剂为硅微粉、水泥、球状沥青、金属硅粉,各原料添加比为4-6:4-6:4-6:5-7;所述硅微粉的粒径为5-10μm,水泥粒径为3-5μm,球状沥青的粒径为0.2-1mm,金属硅粉粒径为190-210目。
6.根据权利要求1所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述添加剂为有机纤维、金属铝粉、六偏磷酸钠、减水剂BC-2,各原料添加比为7-9:13-16:4-6:14-17。
7.根据权利要求6所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述添加剂中有机纤维为聚丙烯纤维,长度为2.5-3.5mm,直径为20-40μm,熔点为173-178℃。
8.根据权利要求6所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述金属铝粉粒径为80-200目。
9.根据权利要求1所述的一种原位生成赛隆高强度耐侵蚀浇注料,其特征在于,所述基质为氮化硅与α-活性氧化铝微粉;所述氮化硅粒径为4-6um,α-活性氧化铝微粉粒径为2-4um;氮化硅与α-活性氧化铝微粉重量比为1-3:1。
10.如权利要求1-9任一项所述的一种原位生成赛隆高强度耐侵蚀浇注料的制备方法,其特征在于,包括以下步骤:
(1)按比例称取棕刚玉和碳化硅,混合搅拌3-4min;
(2)再将结合剂、添加剂、基质按比例加入到步骤(1)的混合物中,搅拌4-6min,搅拌均匀即可。
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